AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
DESPEC
Draft saved at 00:00:00
Fields marked with
*
are required
Entry time:
Sat Mar 29 11:38:18 2025
Author
*
:
Subject
*
:
Looking at the HV bias in a scope to see if it is the source of noise especially on the p+n side Channel 1: HV Core channel 4 Channel 2: HV Braid Channel 4 Math: Ch1 - Ch2 100V bias (100 uA leakage current for 1 MOhm) No obvious frequency components or large frequency components? I do not know how this compares to RIKEN or STFC-DL Updated to put the right frequency range (misread before) Fig 3-4: Normalish looking data Fig 5-6: Examples of noise appearing randomly on math line Fig 7: 1ms long trace, noise stopped appearing Update 26.02.2020 Fig 8: Trace with all 4 HV channels off Fig 9: Trace with only oscilloscope biased Fig 10: Trace with braids unplugged from all 3 FEE64s (only channel 4 connected) Things to try: Joining clean earth & chassis ground? Checking HV jumper? Finding 'scope probes and testing NIM socket?
Encoding
:
HTML
ELCode
plain
Suppress Email notification
Attachment 1:
Drop attachments here...
Draft saved at 00:00:00
ELOG V3.1.4-unknown